{"id":119259,"date":"2026-10-29T07:32:55","date_gmt":"2026-10-28T23:32:55","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/119259.html"},"modified":"2026-10-29T07:32:55","modified_gmt":"2026-10-28T23:32:55","slug":"linux-%e7%bd%91%e7%bb%9c%ef%bc%9ahttp%ef%bc%88%e4%b8%89%ef%bc%89linux-%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/119259.html","title":{"rendered":"Linux \u7f51\u7edc\uff1aHTTP\uff08\u4e09\uff09Linux \u670d\u52a1\u5668\u5b9e\u73b0"},"content":{"rendered":"

Linux \u7f51\u7edc：HTTP（\u4e09）Linux \u670d\u52a1\u5668\u5b9e\u73b0<\/h2>\n

\u5f15\u8a00<\/h3>\n

\u524d\u4e24\u7bc7\u5df2\u7ecf\u4ecb\u7ecd\u4e86 HTTP \u62a5\u6587\u3001\u65b9\u6cd5\u3001\u72b6\u6001\u7801\u548c\u767b\u5f55\u72b6\u6001\u3002\u73b0\u5728\u628a\u8fd9\u4e9b\u89c4\u5219\u843d\u5b9e\u5230 Linux \u7a0b\u5e8f\u4e2d：\u6d4f\u89c8\u5668\u8bbf\u95ee\u9996\u9875\u65f6，\u670d\u52a1\u5668\u600e\u6837\u628a\u6536\u5230\u7684\u5b57\u8282\u53d8\u6210\u8bf7\u6c42\u5bf9\u8c61，\u518d\u627e\u5230\u6587\u4ef6\u3001\u7ec4\u7ec7\u54cd\u5e94，\u6700\u540e\u5b8c\u6574\u5730\u53d1\u56de\u53bb？<\/p>\n

\u5b9e\u73b0\u4e00\u4e2a\u6559\u5b66\u670d\u52a1\u5668，\u91cd\u70b9\u4e0d\u5728\u4e8e\u628a\u6240\u6709 HTTP \u529f\u80fd\u4e00\u6b21\u5199\u9f50，\u800c\u5728\u4e8e\u8ba9\u6536\u53d1\u3001\u89e3\u6790\u548c\u4e1a\u52a1\u5404\u81ea\u627f\u62c5\u660e\u786e\u7684\u804c\u8d23\u3002\u4e0b\u9762\u7ed3\u5408 C++17 \u4ee3\u7801\u7247\u6bb5\u5206\u6790\u8fd9\u4e9b\u6a21\u5757，\u4ee5\u53ca\u4ece\u56de\u663e\u7a0b\u5e8f\u6269\u5c55\u5230 HTTP \u65f6\u9700\u8981\u8865\u4e0a\u7684\u5904\u7406\u3002<\/p>\n

\u4e00\u3001\u670d\u52a1\u5668\u7684\u6a21\u5757\u4e0e\u8c03\u7528\u987a\u5e8f<\/h3>\n

\u6700\u5c0f\u7ed3\u6784\u53ef\u4ee5\u5206\u4e3a\u56db\u5c42：<\/p>\n\n\u6a21\u5757\u4e3b\u8981\u804c\u8d23<\/tr>\n\n\n\n\n\n
Socket \/ TcpServer<\/td>\n\u76d1\u542c\u3001\u63a5\u5165\u8fde\u63a5\u3001\u8bfb\u5199\u5b57\u8282\u3001\u7ba1\u7406\u63cf\u8ff0\u7b26<\/td>\n<\/tr>\n
HttpRequest<\/td>\n\u89e3\u6790\u65b9\u6cd5\u3001\u76ee\u6807\u3001\u7248\u672c\u3001\u62a5\u5934\u548c\u6b63\u6587<\/td>\n<\/tr>\n
HttpProtocol \/ Router<\/td>\n\u9009\u62e9\u4e1a\u52a1\u5904\u7406\u51fd\u6570\u6216\u9759\u6001\u8d44\u6e90\u5904\u7406<\/td>\n<\/tr>\n
HttpResponse<\/td>\n\u4fdd\u5b58\u5904\u7406\u7ed3\u679c，\u5e8f\u5217\u5316\u54cd\u5e94<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

#mermaid-svg-swg1ErWKZapdxqI3{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-swg1ErWKZapdxqI3 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-swg1ErWKZapdxqI3 .error-icon{fill:#552222;}#mermaid-svg-swg1ErWKZapdxqI3 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-swg1ErWKZapdxqI3 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-swg1ErWKZapdxqI3 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-swg1ErWKZapdxqI3 .marker.cross{stroke:#333333;}#mermaid-svg-swg1ErWKZapdxqI3 svg{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-swg1ErWKZapdxqI3 p{margin:0;}#mermaid-svg-swg1ErWKZapdxqI3 .label{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;color:#333;}#mermaid-svg-swg1ErWKZapdxqI3 .cluster-label text{fill:#333;}#mermaid-svg-swg1ErWKZapdxqI3 .cluster-label span{color:#333;}#mermaid-svg-swg1ErWKZapdxqI3 .cluster-label span p{background-color:transparent;}#mermaid-svg-swg1ErWKZapdxqI3 .label text,#mermaid-svg-swg1ErWKZapdxqI3 span{fill:#333;color:#333;}#mermaid-svg-swg1ErWKZapdxqI3 .node rect,#mermaid-svg-swg1ErWKZapdxqI3 .node circle,#mermaid-svg-swg1ErWKZapdxqI3 .node ellipse,#mermaid-svg-swg1ErWKZapdxqI3 .node polygon,#mermaid-svg-swg1ErWKZapdxqI3 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-swg1ErWKZapdxqI3 .rough-node .label text,#mermaid-svg-swg1ErWKZapdxqI3 .node .label text,#mermaid-svg-swg1ErWKZapdxqI3 .image-shape .label,#mermaid-svg-swg1ErWKZapdxqI3 .icon-shape .label{text-anchor:middle;}#mermaid-svg-swg1ErWKZapdxqI3 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-swg1ErWKZapdxqI3 .rough-node .label,#mermaid-svg-swg1ErWKZapdxqI3 .node .label,#mermaid-svg-swg1ErWKZapdxqI3 .image-shape .label,#mermaid-svg-swg1ErWKZapdxqI3 .icon-shape .label{text-align:center;}#mermaid-svg-swg1ErWKZapdxqI3 .node.clickable{cursor:pointer;}#mermaid-svg-swg1ErWKZapdxqI3 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-swg1ErWKZapdxqI3 .arrowheadPath{fill:#333333;}#mermaid-svg-swg1ErWKZapdxqI3 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-swg1ErWKZapdxqI3 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-swg1ErWKZapdxqI3 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-swg1ErWKZapdxqI3 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-swg1ErWKZapdxqI3 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-swg1ErWKZapdxqI3 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-swg1ErWKZapdxqI3 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-swg1ErWKZapdxqI3 .cluster text{fill:#333;}#mermaid-svg-swg1ErWKZapdxqI3 .cluster span{color:#333;}#mermaid-svg-swg1ErWKZapdxqI3 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-swg1ErWKZapdxqI3 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-swg1ErWKZapdxqI3 rect.text{fill:none;stroke-width:0;}#mermaid-svg-swg1ErWKZapdxqI3 .icon-shape,#mermaid-svg-swg1ErWKZapdxqI3 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-swg1ErWKZapdxqI3 .icon-shape p,#mermaid-svg-swg1ErWKZapdxqI3 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-swg1ErWKZapdxqI3 .icon-shape .label rect,#mermaid-svg-swg1ErWKZapdxqI3 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-swg1ErWKZapdxqI3 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-swg1ErWKZapdxqI3 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-swg1ErWKZapdxqI3 :root{–mermaid-font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;}<\/p>\n

<\/span><\/p>\n

<\/span><\/p>\n

<\/p>\n

\u8fd8\u7f3a\u6570\u636e<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u683c\u5f0f\u9519\u8bef<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u5b8c\u6574<\/p>\n

<\/span><\/p>\n

<\/span><\/p>\n

<\/span><\/p>\n

<\/span><\/p>\n

<\/span><\/p>\n

<\/p>\n

accept \u63a5\u5165\u8fde\u63a5<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u7d2f\u8ba1\u63a5\u6536\u5b57\u8282<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u8bf7\u6c42\u662f\u5426\u5b8c\u6574\u4e14\u5408\u6cd5<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u751f\u6210\u9519\u8bef\u54cd\u5e94<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u6309\u65b9\u6cd5\u548c\u8def\u5f84\u9009\u62e9\u5904\u7406\u5668<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u8bfb\u53d6\u8d44\u6e90\u6216\u6267\u884c\u4e1a\u52a1<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u5e8f\u5217\u5316\u54cd\u5e94<\/p>\n

<\/span><\/p>\n

<\/p>\n

\u5faa\u73af\u53d1\u9001\u5e76\u5173\u95ed\u8fde\u63a5<\/p>\n

<\/span><\/p>\n

\u672c\u6587\u91c7\u7528\u963b\u585e\u5957\u63a5\u5b57，\u4e00\u6761\u8fde\u63a5\u5904\u7406\u4e00\u6761\u8bf7\u6c42，\u54cd\u5e94\u660e\u786e\u643a\u5e26 Connection: close\u3002\u8fd9\u662f\u4e3a\u4e86\u5148\u628a\u5b8c\u6574\u6d41\u7a0b\u8bb2\u6e05，\u540e\u9762\u518d\u6269\u5c55\u8fde\u63a5\u590d\u7528\u3002<\/p>\n

\u89e3\u6790\u5668\u5148\u652f\u6301 HTTP\/1.1 \u7684\u666e\u901a\u8def\u5f84\u5f62\u5f0f，\u4ee5\u53ca\u65e0\u6b63\u6587\u6216\u4f7f\u7528 Content-Length \u5b9a\u754c\u7684\u8bf7\u6c42\u3002\u672a\u5b9e\u73b0\u7684\u4f20\u8f93\u7f16\u7801\u9700\u8981\u660e\u786e\u62d2\u7edd，\u4e0d\u80fd\u628a\u201c\u6d4f\u89c8\u5668\u8fd9\u6b21\u6070\u597d\u53d1\u6765\u4e86\u7b80\u5355\u8bf7\u6c42\u201d\u5f53\u6210\u6240\u6709\u8bf7\u6c42\u7684\u5171\u540c\u6761\u4ef6\u3002<\/p>\n

\u4e8c\u3001\u76d1\u542c\u5957\u63a5\u5b57\u4e0e\u670d\u52a1\u5957\u63a5\u5b57<\/h3>\n

\u521d\u59cb\u5316\u4ecd\u6cbf\u7528 TCP \u7684\u57fa\u672c\u6b65\u9aa4：<\/p>\n

socket \u2192 \u8bbe\u7f6e\u5957\u63a5\u5b57\u9009\u9879 \u2192 bind \u2192 listen
\n \u2193
\n \u5faa\u73af\u8c03\u7528 accept<\/p>\n

\u76d1\u542c\u5957\u63a5\u5b57\u8d1f\u8d23\u63a5\u6536\u65b0\u8fde\u63a5，accept \u8fd4\u56de\u7684\u670d\u52a1\u5957\u63a5\u5b57\u624d\u7528\u4e8e\u5904\u7406\u5177\u4f53\u8bf7\u6c42\u3002\u6d4f\u89c8\u5668\u52a0\u8f7d\u9996\u9875\u3001\u56fe\u7247\u548c\u5176\u4ed6\u8d44\u6e90\u65f6，\u53ef\u80fd\u5efa\u7acb\u591a\u4e2a\u8fde\u63a5；\u670d\u52a1\u5668\u5e94\u9010\u6761\u63a5\u5165，\u800c\u4e0d\u662f\u5904\u7406\u5b8c\u9996\u9875\u5c31\u9000\u51fa\u3002<\/p>\n

\u521d\u59cb\u5316\u548c\u63a5\u5165\u64cd\u4f5c\u90fd\u8981\u68c0\u67e5\u8fd4\u56de\u503c\u3002\u8bbe\u7f6e SO_REUSEADDR \u6709\u52a9\u4e8e\u5904\u7406\u670d\u52a1\u91cd\u542f\u65f6\u7684\u5730\u5740\u590d\u7528，\u4f46\u4e0d\u80fd\u7406\u89e3\u4e3a\u5141\u8bb8\u4efb\u610f\u591a\u4e2a\u670d\u52a1\u5668\u540c\u65f6\u5360\u7528\u540c\u4e00\u4e2a\u76d1\u542c\u5730\u5740\u3002\u76f8\u5173\u63a5\u53e3\u542b\u4e49\u89c1 Linux socket \u624b\u518c\u3002<\/p>\n

\u7aef\u53e3\u4e0e\u8d44\u6e90\u6839\u76ee\u5f55\u6700\u597d\u4f5c\u4e3a\u914d\u7f6e\u4fdd\u5b58\u3002\u6d4f\u89c8\u5668\u8bbf\u95ee\u7684 \/index.html \u662f\u534f\u8bae\u4e2d\u7684\u8d44\u6e90\u8def\u5f84，\u76d1\u542c\u7aef\u53e3\u51b3\u5b9a\u8fde\u63a5\u5230\u54ea\u4e2a\u670d\u52a1，\u4e24\u8005\u4e0d\u5e94\u8be5\u6df7\u5728\u540c\u4e00\u4e2a\u521d\u59cb\u5316\u903b\u8f91\u91cc\u3002<\/p>\n

\u4e09\u3001\u7d2f\u8ba1\u63a5\u6536\u4e0e\u8bf7\u6c42\u5b8c\u6574\u6027<\/h3>\n

1. \u6309\u5b57\u8282\u6570\u8ffd\u52a0\u6570\u636e<\/h4>\n

\u4e0b\u9762\u7684\u63a5\u6536\u7247\u6bb5\u9002\u7528\u4e8e\u963b\u585e\u5957\u63a5\u5b57：<\/p>\n

char<\/span> buffer[<\/span>4096<\/span>]<\/span>;<\/span>
\nssize_t n =<\/span> recv<\/span>(<\/span>fd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>,<\/span> 0<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>n ><\/span> 0<\/span>)<\/span> {<\/span>
\n input.<\/span>append<\/span>(<\/span>buffer,<\/span> static_cast<\/span><<\/span>std::<\/span>size_t><\/span><\/span><\/span>(<\/span>n)<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

\u8fd9\u91cc\u4f7f\u7528 append(buffer, n)，\u800c\u4e0d\u662f\u628a\u7f13\u51b2\u533a\u5f53\u6210\u4ee5\u96f6\u7ed3\u5c3e\u7684\u5b57\u7b26\u4e32\u3002\u4e00\u6b21\u63a5\u6536\u53ef\u4ee5\u53ea\u6709\u534a\u884c\u62a5\u5934，\u4e5f\u53ef\u4ee5\u5e26\u4e0a\u6b63\u6587；\u7f13\u51b2\u533a\u5927\u5c0f\u53ea\u662f\u672c\u6b21\u8bfb\u64cd\u4f5c\u7684\u5bb9\u91cf\u3002<\/p>\n

\u8bfb\u5230 EINTR \u53ef\u4ee5\u91cd\u8bd5；\u5bf9\u7aef\u5173\u95ed\u6216\u53d1\u751f\u5176\u4ed6\u9519\u8bef\u65f6，\u5e94\u7ed3\u675f\u672c\u6b21\u8fde\u63a5\u5904\u7406\u3002\u4e0d\u80fd\u628a\u201c\u8fd8\u6ca1\u6709\u6536\u9f50\u8bf7\u6c42\u201d\u8bef\u8ba4\u4e3a\u201c\u8bf7\u6c42\u5df2\u7ecf\u65e0\u6548\u201d，\u4e5f\u4e0d\u80fd\u5728\u4e0b\u4e00\u6b21\u8bfb\u53d6\u524d\u6e05\u7a7a\u5df2\u6709\u5b57\u8282\u3002<\/p>\n

2. \u4e3a\u89e3\u6790\u7ed3\u679c\u8bbe\u7f6e\u4e09\u79cd\u72b6\u6001<\/h4>\n

enum<\/span> class<\/span> ParseState<\/span> {<\/span>
\n NeedMore,<\/span>
\n Complete,<\/span>
\n Error
\n}<\/span>;<\/span><\/p>\n

\u5148\u67e5\u627e \\\\r\\\\n\\\\r\\\\n\u3002\u627e\u4e0d\u5230\u65f6，\u7ee7\u7eed\u63a5\u6536，\u76f4\u5230\u8fbe\u5230\u62a5\u5934\u5927\u5c0f\u4e0a\u9650\u6216\u7b49\u5f85\u8d85\u65f6\u3002\u627e\u5230\u540e，\u53ea\u80fd\u8bf4\u660e\u62a5\u5934\u5b8c\u6574，\u8fd8\u8981\u6839\u636e\u62a5\u5934\u786e\u5b9a\u6b63\u6587\u957f\u5ea6\u3002<\/p>\n

\u82e5\u4e0d\u5b58\u5728 Transfer-Encoding \u548c Content-Length，\u8bf7\u6c42\u6b63\u6587\u957f\u5ea6\u6309\u96f6\u5904\u7406；\u82e5\u5b58\u5728\u5408\u6cd5 Content-Length，\u5c31\u7ee7\u7eed\u7b49\u5f85\u5bf9\u5e94\u5b57\u8282\u6570\u3002\u8fd9\u4e2a\u5224\u65ad\u6765\u81ea\u62a5\u6587\u5b9a\u754c\u89c4\u5219，\u4e0d\u80fd\u7b80\u5355\u5199\u6210\u201cGET \u6ca1\u6b63\u6587，\u5176\u4ed6\u65b9\u6cd5\u90fd\u5fc5\u987b\u6709\u957f\u5ea6\u201d\u3002RFC 9112\u89c4\u5b9a\u4e86\u6d88\u606f\u957f\u5ea6\u7684\u5224\u5b9a\u987a\u5e8f\u3002<\/p>\n

\u6559\u5b66\u5b9e\u73b0\u53ef\u4ee5\u628a\u62a5\u5934\u9650\u5236\u4e3a 16 KiB，\u6b63\u6587\u9650\u5236\u4e3a 1 MiB\u3002\u957f\u5ea6\u5b57\u6bb5\u8981\u9010\u4f4d\u9a8c\u8bc1\u4e3a\u5341\u8fdb\u5236\u6570\u5b57，\u68c0\u67e5\u4e0a\u9650\u540e\u518d\u53c2\u4e0e\u52a0\u6cd5，\u907f\u514d\u8d1f\u6570\u3001\u6ea2\u51fa\u548c\u8fc7\u5927\u5185\u5b58\u5206\u914d\u3002<\/p>\n

\u672c\u4f8b\u9047\u5230\u91cd\u590d Content-Length \u65f6\u76f4\u63a5\u62d2\u7edd；Transfer-Encoding \u4e0e Content-Length \u540c\u65f6\u51fa\u73b0\u65f6\u6309\u9519\u8bef\u5904\u7406\u5e76\u5173\u95ed\u8fde\u63a5\u3002\u82e5\u6ca1\u6709\u5b9e\u73b0\u5206\u5757\u89e3\u7801，\u4e5f\u5e94\u62d2\u7edd\u76f8\u5173\u8bf7\u6c42，\u800c\u4e0d\u662f\u5ffd\u7565 Transfer-Encoding \u540e\u7ee7\u7eed\u5904\u7406\u3002<\/p>\n

\u5bf9\u4e8e Expect: 100-continue，\u8fd8\u8981\u5728\u7b49\u5f85\u6b63\u6587\u524d\u51b3\u5b9a\u662f\u5426\u652f\u6301\u3002\u672a\u5b9e\u73b0\u65f6\u53ef\u4ee5\u8fd4\u56de 417 \u5e76\u5173\u95ed\u8fde\u63a5，\u5426\u5219\u53ef\u80fd\u51fa\u73b0\u5ba2\u6237\u7aef\u7b49\u786e\u8ba4\u3001\u670d\u52a1\u5668\u7b49\u6b63\u6587\u7684\u76f8\u4e92\u7b49\u5f85\u3002<\/p>\n

\u56db\u3001\u89e3\u6790\u8bf7\u6c42\u884c\u4e0e\u62a5\u5934<\/h3>\n

\u8bf7\u6c42\u5bf9\u8c61\u5e94\u5206\u522b\u4fdd\u5b58\u534f\u8bae\u5b57\u6bb5，\u800c\u4e0d\u662f\u4e00\u5f00\u59cb\u5c31\u628a URL \u6539\u6210\u672c\u5730\u6587\u4ef6\u540d：<\/p>\n

using<\/span> HeaderFields =<\/span>
\n std::<\/span>vector<<\/span>std::<\/span>pair<<\/span>std::<\/span>string,<\/span> std::<\/span>string>><\/span>;<\/span><\/p>\n

struct<\/span> HttpRequest<\/span> {<\/span>
\n std::<\/span>string method;<\/span>
\n std::<\/span>string target;<\/span>
\n std::<\/span>string path;<\/span>
\n std::<\/span>string query;<\/span>
\n std::<\/span>string version;<\/span>
\n HeaderFields headers;<\/span>
\n std::<\/span>string body;<\/span>
\n}<\/span>;<\/span><\/p>\n

\u4f8b\u5982 GET \/image\/th.jpg?v=1 HTTP\/1.1，\u89e3\u6790\u540e path \u662f \/image\/th.jpg，query \u662f v=1\u3002\u53d6\u540e\u7f00\u3001\u5339\u914d\u8def\u7531\u548c\u5bfb\u627e\u6587\u4ef6，\u90fd\u5e94\u8be5\u57fa\u4e8e\u6b63\u786e\u62c6\u5206\u540e\u7684\u5b57\u6bb5\u3002<\/p>\n

\u8bfb\u53d6\u62a5\u5934\u884c\u65f6，\u201c\u6ca1\u6709\u5b8c\u6574\u884c\u201d\u548c\u201c\u8bfb\u5230\u7a7a\u884c\u201d\u4e5f\u5fc5\u987b\u533a\u5206：<\/p>\n

std::<\/span>optional<<\/span>std::<\/span>string><\/span> TakeLine<\/span>(<\/span>std::<\/span>string&<\/span> text)<\/span> {<\/span>
\n auto<\/span> pos =<\/span> text.<\/span>find<\/span>(<\/span>"\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>pos ==<\/span> std::<\/span>string::<\/span>npos)<\/span> return<\/span> std::<\/span>nullopt;<\/span>
\n std::<\/span>string line =<\/span> text.<\/span>substr<\/span>(<\/span>0<\/span>,<\/span> pos)<\/span>;<\/span>
\n text.<\/span>erase<\/span>(<\/span>0<\/span>,<\/span> pos +<\/span> 2<\/span>)<\/span>;<\/span>
\n return<\/span> line;<\/span>
\n}<\/span><\/p>\n

nullopt \u8868\u793a\u8fd8\u6ca1\u6709\u5b8c\u6574\u884c，\u503c\u4e3a\u7a7a\u5b57\u7b26\u4e32\u5219\u8868\u793a\u7a7a\u884c\u3002\u8fd9\u91cc\u5efa\u8bae\u5bf9\u5df2\u6536\u9f50\u7684\u62a5\u5934\u526f\u672c\u8c03\u7528，\u539f\u59cb\u63a5\u6536\u7f13\u51b2\u533a\u5728\u6d88\u606f\u5b8c\u6574\u6027\u786e\u8ba4\u524d\u4fdd\u6301\u4e0d\u53d8，\u907f\u514d\u89e3\u6790\u5230\u4e00\u534a\u540e\u65e0\u6cd5\u4ece\u5934\u91cd\u8bd5\u3002<\/p>\n

\u8bf7\u6c42\u884c\u9700\u8981\u9a8c\u8bc1\u65b9\u6cd5\u3001\u8bf7\u6c42\u76ee\u6807\u548c\u7248\u672c\u662f\u5426\u6210\u529f\u63d0\u53d6，\u5e76\u62d2\u7edd\u591a\u4f59\u5b57\u6bb5\u3002\u65b9\u6cd5\u540d\u533a\u5206\u5927\u5c0f\u5199；\u62a5\u5934\u5b57\u6bb5\u540d\u5219\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u3002\u4e0d\u8981\u628a\u5bf9 GET \u7684\u5927\u5c0f\u5199\u5bbd\u677e\u6bd4\u8f83，\u63a8\u5e7f\u6210\u6240\u6709\u534f\u8bae\u5b57\u6bb5\u7684\u7edf\u4e00\u89c4\u5219\u3002<\/p>\n

\u62a5\u5934\u5e94\u6309\u7b2c\u4e00\u4e2a\u5192\u53f7\u62c6\u5206，\u518d\u5904\u7406\u503c\u4e24\u4fa7\u5141\u8bb8\u7684\u7a7a\u683c\u548c\u5236\u8868\u7b26\u3002Content-Length:33 \u5e76\u4e0d\u56e0\u4e3a\u5192\u53f7\u540e\u6ca1\u6709\u7a7a\u683c\u5c31\u65e0\u6548，\u4f46\u5b57\u6bb5\u540d\u4e0e\u5192\u53f7\u4e4b\u95f4\u4e0d\u80fd\u968f\u610f\u63d2\u5165\u7a7a\u767d\u3002<\/p>\n

\u4f7f\u7528 HTTP\/1.1 \u65f6\u8fd8\u5e94\u9a8c\u8bc1 Host \u5b57\u6bb5\u3002\u89e3\u6790\u5931\u8d25\u5fc5\u987b\u5411\u4e0a\u8fd4\u56de，\u4e0d\u80fd\u5ffd\u7565\u5404\u9636\u6bb5\u7ed3\u679c\u540e\u4ecd\u7136\u8fd4\u56de\u6210\u529f；\u5426\u5219\u9519\u8bef\u5b57\u6bb5\u4f1a\u7ee7\u7eed\u8fdb\u5165\u8def\u7531\u548c\u6587\u4ef6\u64cd\u4f5c\u3002<\/p>\n

\u4e94\u3001\u65b9\u6cd5\u4e0e\u8def\u5f84\u5171\u540c\u51b3\u5b9a\u8def\u7531<\/h3>\n

\u4e1a\u52a1\u8def\u7531\u53ef\u4ee5\u5148\u6ce8\u518c\u4e3a：<\/p>\n

GET \/health \u2192 \u8fd4\u56de\u8fd0\u884c\u72b6\u6001
\nPOST \/api\/calc \u2192 \u89e3\u6790\u8bf7\u6c42\u5e76\u8ba1\u7b97
\nPOST \/Login \u2192 \u6821\u9a8c\u51ed\u636e\u3001\u521b\u5efa\u4f1a\u8bdd
\nGET \/dashboard \u2192 \u68c0\u67e5\u4f1a\u8bdd\u540e\u8fd4\u56de\u5185\u5bb9<\/p>\n

\u8def\u7531\u5339\u914d\u65f6\u4f7f\u7528\u65b9\u6cd5\u4e0e path，query \u7559\u7ed9\u5177\u4f53\u5904\u7406\u5668\u89e3\u91ca\u3002\u4e0d\u8981\u628a wwwroot \u62fc\u8fdb\u4e1a\u52a1\u8def\u7531\u952e，\u4e5f\u4e0d\u8981\u8ba9\u5904\u7406\u51fd\u6570\u4f9d\u8d56\u78c1\u76d8\u76ee\u5f55\u7ed3\u6784\u3002<\/p>\n

\u82e5\u8def\u5f84\u5b58\u5728\u4f46\u65b9\u6cd5\u4e0d\u5141\u8bb8，\u5e94\u8fd4\u56de 405 \u5e76\u63d0\u4f9b Allow；\u5982\u679c\u6ca1\u6709\u5339\u914d\u7684\u4e1a\u52a1\u8def\u7531，\u518d\u4ea4\u7ed9\u9759\u6001\u8d44\u6e90\u5904\u7406\u5668\u5224\u65ad\u3002\u9759\u6001\u5904\u7406\u5668\u901a\u5e38\u63a5\u6536 GET \u548c HEAD，\u5176\u4ed6\u65b9\u6cd5\u9700\u8981\u6309\u8d44\u6e90\u89c4\u5219\u5904\u7406\u3002<\/p>\n

\u67e5\u8be2\u53c2\u6570\u4e0e\u6b63\u6587\u4e5f\u5e94\u5206\u522b\u89e3\u6790\u3002POST \/api\/calc?mode=int \u540c\u65f6\u5e26\u6709\u67e5\u8be2\u4fe1\u606f\u548c\u6b63\u6587，\u5e76\u4e0d\u77db\u76fe\u3002\u5904\u7406\u5668\u5148\u68c0\u67e5 Content-Type，\u518d\u9009\u62e9 JSON \u6216\u8868\u5355\u89e3\u7801\u65b9\u5f0f\u3002<\/p>\n

\u628a\u8def\u7531\u5206\u53d1\u4e0e\u4e1a\u52a1\u6267\u884c\u5206\u5f00\u540e，\u767b\u5f55\u5904\u7406\u5668\u624d\u6709\u6e05\u695a\u7684\u8fb9\u754c：\u68c0\u67e5\u5b57\u6bb5\u3001\u9a8c\u8bc1\u51ed\u636e\u3001\u521b\u5efa\u6709\u6548\u4f1a\u8bdd\u3001\u8bbe\u7f6e\u54cd\u5e94\u3002\u8fd4\u56de\u4e00\u6bb5 Login success! \u53ea\u662f\u54cd\u5e94\u5185\u5bb9，\u4e0d\u80fd\u4ee3\u66ff\u524d\u9762\u7684\u4e1a\u52a1\u6b65\u9aa4\u3002<\/p>\n

\u516d\u3001\u4ece\u8d44\u6e90\u8def\u5f84\u5230\u9759\u6001\u6587\u4ef6<\/h3>\n

\u5047\u8bbe\u8d44\u6e90\u6839\u76ee\u5f55\u4e3a wwwroot，\u57fa\u7840\u6620\u5c04\u5173\u7cfb\u662f：<\/p>\n\n\u8bf7\u6c42\u8def\u5f84\u5bf9\u5e94\u8d44\u6e90<\/tr>\n\n\n\n\n\n
\/<\/td>\n\u9ed8\u8ba4\u9996\u9875 index.html<\/td>\n<\/tr>\n
\/index.html<\/td>\nwwwroot\/index.html<\/td>\n<\/tr>\n
\/image\/th.jpg<\/td>\nwwwroot\/image\/th.jpg<\/td>\n<\/tr>\n
\/missing.html<\/td>\n\u7f3a\u5931\u65f6\u8fd4\u56de 404<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4f46\u201c\u6839\u76ee\u5f55 + \u7528\u6237\u8def\u5f84\u201d\u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u8fd8\u4e0d\u591f\u3002\u8bf7\u6c42\u53ef\u80fd\u5305\u542b ..\u3001\u767e\u5206\u53f7\u7f16\u7801\u6216\u6307\u5411\u5176\u4ed6\u76ee\u5f55\u7684\u7b26\u53f7\u94fe\u63a5，\u6700\u7ec8\u8bbf\u95ee\u4f4d\u7f6e\u53ef\u80fd\u8d85\u51fa\u8d44\u6e90\u6839\u76ee\u5f55\u3002<\/p>\n

\u5b9e\u73b0\u65f6\u5148\u5206\u79bb\u67e5\u8be2\u5b57\u7b26\u4e32，\u518d\u6309\u65e2\u5b9a\u89c4\u5219\u5bf9\u8def\u5f84\u89e3\u7801\u4e00\u6b21，\u62d2\u7edd\u975e\u6cd5\u7f16\u7801\u3001\u96f6\u5b57\u8282\u53ca\u65e0\u6cd5\u5904\u7406\u7684\u7f16\u7801\u5206\u9694\u7b26；\u968f\u540e\u6309\u8def\u5f84\u7ec4\u4ef6\u5904\u7406\u76ee\u5f55\u5173\u7cfb，\u786e\u8ba4\u76ee\u6807\u53d7\u6839\u76ee\u5f55\u7ea6\u675f\u3002<\/p>\n

\u4e0d\u80fd\u53ea\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ee5 wwwroot \u5f00\u5934：wwwroot_backup \u4e5f\u6ee1\u8db3\u8fd9\u79cd\u524d\u7f00\u5224\u65ad\u3002\u5355\u7eaf\u8bcd\u6cd5\u89c4\u8303\u5316\u540c\u6837\u4e0d\u80fd\u89e3\u51b3\u7b26\u53f7\u94fe\u63a5\u6307\u5411\u6839\u76ee\u5f55\u4e4b\u5916\u7684\u95ee\u9898\u3002<\/p>\n

\u5728 Linux \u4e2d，\u53ef\u4ee5\u57fa\u4e8e\u8d44\u6e90\u6839\u76ee\u5f55\u7684\u63cf\u8ff0\u7b26，\u4f7f\u7528 openat2 \u914d\u5408 RESOLVE_BENEATH \u548c RESOLVE_NO_SYMLINKS \u9650\u5236\u8def\u5f84\u89e3\u6790\u3002\u4f20\u5165\u7684\u662f\u53bb\u6389 URL \u524d\u5bfc\u659c\u6760\u540e\u7684\u76f8\u5bf9\u8def\u5f84；\u4e0d\u540c\u7b56\u7565\u5bf9\u7b26\u53f7\u94fe\u63a5\u7684\u5904\u7406\u5e94\u4fdd\u6301\u4e00\u81f4\u3002openat2 \u624b\u518c\u8bf4\u660e\u4e86\u8fd9\u4e9b\u7ea6\u675f\u3002<\/p>\n

\u8fd9\u6837\u7684\u5904\u7406\u628a\u8fb9\u754c\u68c0\u67e5\u4e0e\u5b9e\u9645\u6253\u5f00\u7ed3\u5408\u8d77\u6765\u3002\u82e5\u5148\u68c0\u67e5\u8def\u5f84，\u968f\u540e\u518d\u6309\u539f\u5b57\u7b26\u4e32\u91cd\u65b0\u6253\u5f00，\u76ee\u5f55\u6216\u94fe\u63a5\u5728\u4e24\u6b21\u64cd\u4f5c\u4e4b\u95f4\u53d8\u5316，\u4ecd\u53ef\u80fd\u4f7f\u68c0\u67e5\u5931\u6548\u3002<\/p>\n

\u4e03\u3001\u6309\u4e8c\u8fdb\u5236\u5b57\u8282\u8bfb\u53d6\u6587\u4ef6<\/h3>\n

\u8bfb\u53d6\u7ed3\u679c\u5fc5\u987b\u533a\u5206\u201c\u5931\u8d25\u201d\u4e0e\u201c\u6210\u529f\u8bfb\u53d6\u96f6\u5b57\u8282\u201d\u3002\u4e00\u4e2a\u5408\u6cd5\u7a7a\u6587\u4ef6\u53ef\u4ee5\u8fd4\u56de 200 \u548c Content-Length: 0，\u4e0d\u80fd\u4ec5\u56e0\u4e3a\u5b57\u7b26\u4e32\u4e3a\u7a7a\u5c31\u8ba4\u5b9a\u8d44\u6e90\u4e0d\u5b58\u5728\u3002<\/p>\n

\u4e0b\u9762\u7684\u51fd\u6570\u63a5\u6536\u5df2\u7ecf\u53d7\u63a7\u6253\u5f00\u3001\u504f\u79fb\u4e3a\u96f6\u7684\u53ea\u8bfb\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u5b83\u4e0d\u8d1f\u8d23\u5173\u95ed\u63cf\u8ff0\u7b26，\u8c03\u7528\u65b9\u7ba1\u7406\u5176\u751f\u547d\u5468\u671f：<\/p>\n

std::<\/span>optional<<\/span>std::<\/span>string><\/span> ReadFile<\/span>(<\/span>int<\/span> fd)<\/span> {<\/span>
\n constexpr<\/span> std::<\/span>size_t maxFile =<\/span> 16<\/span> *<\/span> 1024<\/span> *<\/span> 1024<\/span>;<\/span>
\n struct<\/span> stat<\/span> st{<\/span>}<\/span>;<\/span>
\n if<\/span> (<\/span>fstat<\/span>(<\/span>fd,<\/span> &<\/span>st)<\/span> <<\/span> 0<\/span> ||<\/span> !<\/span>S_ISREG<\/span>(<\/span>st.<\/span>st_mode)<\/span> ||<\/span>
\n st.<\/span>st_size <<\/span> 0<\/span> ||<\/span>
\n st.<\/span>st_size ><\/span> static_cast<\/span><<\/span>off_t><\/span><\/span><\/span>(<\/span>maxFile)<\/span>)<\/span> {<\/span>
\n return<\/span> std::<\/span>nullopt;<\/span>
\n }<\/span><\/p>\n

std::<\/span>string body<\/span>(<\/span>static_cast<\/span><<\/span>std::<\/span>size_t><\/span><\/span><\/span>(<\/span>st.<\/span>st_size)<\/span>,<\/span> '\\\\0'<\/span>)<\/span>;<\/span>
\n std::<\/span>size_t offset =<\/span> 0<\/span>;<\/span>
\n while<\/span> (<\/span>offset <<\/span> body.<\/span>size<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
\n ssize_t n =<\/span> read<\/span>(<\/span>fd,<\/span> body.<\/span>data<\/span>(<\/span>)<\/span> +<\/span> offset,<\/span>
\n body.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> offset)<\/span>;<\/span>
\n if<\/span> (<\/span>n <<\/span> 0<\/span> &&<\/span> errno ==<\/span> EINTR)<\/span> continue<\/span>;<\/span>
\n if<\/span> (<\/span>n <=<\/span> 0<\/span>)<\/span> return<\/span> std::<\/span>nullopt;<\/span>
\n offset +=<\/span> static_cast<\/span><<\/span>std::<\/span>size_t><\/span><\/span><\/span>(<\/span>n)<\/span>;<\/span>
\n }<\/span>
\n return<\/span> body;<\/span>
\n}<\/span><\/p>\n

\u8fd9\u91cc\u9650\u5236\u5355\u6587\u4ef6\u5927\u5c0f\u4e3a 16 MiB，\u907f\u514d\u4e00\u6b21\u628a\u4efb\u610f\u5927\u6587\u4ef6\u88c5\u8fdb\u5185\u5b58\u3002\u7a7a\u6587\u4ef6\u8fd4\u56de\u4e00\u4e2a\u6709\u503c\u4f46\u5185\u5bb9\u4e3a\u7a7a\u7684 optional；nullopt \u624d\u8868\u793a\u5931\u8d25\u3002<\/p>\n

POSIX \u7684 read \u6309\u5b57\u8282\u8bfb\u53d6，\u4e0d\u4f1a\u5220\u6389\u6362\u884c，\u4e5f\u4e0d\u4f1a\u9047\u5230\u96f6\u5b57\u8282\u5c31\u505c\u6b62\u3002\u5982\u679c\u4f7f\u7528 C++ \u6587\u4ef6\u6d41，\u5e94\u4ee5\u4e8c\u8fdb\u5236\u65b9\u5f0f\u6253\u5f00，\u5e76\u4f7f\u7528 C++17 \u7684\u53ef\u5199 data()，\u4e0d\u8981\u5f3a\u8f6c c_str() \u540e\u5199\u5165\u3002<\/p>\n

\u6253\u5f00\u5931\u8d25\u8fd8\u9700\u8981\u4fdd\u7559\u9519\u8bef\u539f\u56e0：\u8d44\u6e90\u7f3a\u5931\u53ef\u4ee5\u8fd4\u56de 404，\u6743\u9650\u95ee\u9898\u6309\u7b56\u7565\u8fd4\u56de 403，\u5176\u4ed6\u5185\u90e8\u9519\u8bef\u5219\u53ef\u80fd\u8fd4\u56de 500\u3002\u9519\u8bef\u9875\u672c\u8eab\u4e0d\u5b58\u5728\u65f6，\u4e5f\u5e94\u6709\u5185\u7f6e\u7684\u7b80\u77ed\u6b63\u6587，\u907f\u514d\u4e0d\u65ad\u91cd\u5b9a\u5411\u5230\u4e0d\u5b58\u5728\u7684\u9519\u8bef\u9875\u3002<\/p>\n

\u516b\u3001\u7ec4\u7ec7\u5e76\u5e8f\u5217\u5316\u54cd\u5e94<\/h3>\n

\u54cd\u5e94\u62a5\u5934\u5efa\u8bae\u7528\u80fd\u4fdd\u7559\u91cd\u590d\u5b57\u6bb5\u7684\u7ed3\u6784\u4fdd\u5b58，\u4f8b\u5982\u524d\u9762\u5b9a\u4e49\u7684 HeaderFields\u3002\u591a\u6761 Set-Cookie \u5e94\u5206\u522b\u8f93\u51fa，\u5355\u503c map \u4f1a\u8986\u76d6\u540c\u540d\u952e\u3002Set-Cookie \u6587\u6863\u8bf4\u660e\u4e86\u8fd9\u79cd\u8f93\u51fa\u5f62\u5f0f\u3002<\/p>\n

\u5bf9\u4e8e 200\u3001400\u3001404\u3001405 \u7b49\u5141\u8bb8\u6b63\u6587\u7684\u54cd\u5e94，\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u5e8f\u5217\u5316\u65b9\u5f0f：<\/p>\n

std::<\/span>string SerializeBodyResponse<\/span>(<\/span>
\n int<\/span> code,<\/span> const<\/span> std::<\/span>string&<\/span> reason,<\/span>
\n const<\/span> HeaderFields&<\/span> fields,<\/span> const<\/span> std::<\/span>string&<\/span> body,<\/span>
\n bool<\/span> headOnly =<\/span> false<\/span>)<\/span> {<\/span>
\n std::<\/span>string out =<\/span> "HTTP\/1.1 "<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>code)<\/span>;<\/span>
\n out +=<\/span> " "<\/span> +<\/span> reason +<\/span> "\\\\r\\\\n"<\/span>;<\/span>
\n for<\/span> (<\/span>const<\/span> auto<\/span>&<\/span> field :<\/span> fields)<\/span> {<\/span>
\n out +=<\/span> field.<\/span>first +<\/span> ": "<\/span> +<\/span> field.<\/span>second +<\/span> "\\\\r\\\\n"<\/span>;<\/span>
\n }<\/span>
\n out +=<\/span> "Content-Length: "<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>body.<\/span>size<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n out +=<\/span> "\\\\r\\\\nConnection: close\\\\r\\\\n\\\\r\\\\n"<\/span>;<\/span>
\n if<\/span> (<\/span>!<\/span>headOnly)<\/span> out +=<\/span> body;<\/span>
\n return<\/span> out;<\/span>
\n}<\/span><\/p>\n

\u8fd9\u91cc\u7684 fields \u53ea\u4fdd\u5b58 Content-Type\u3001Allow \u7b49\u989d\u5916\u5b57\u6bb5，\u4e0d\u80fd\u518d\u6b21\u52a0\u5165 Content-Length \u6216 Connection\u3002\u5b57\u6bb5\u540d\u4e0e\u503c\u7531\u53d7\u63a7\u903b\u8f91\u751f\u6210，\u62d2\u7edd\u5176\u4e2d\u51fa\u73b0\u56de\u8f66\u548c\u6362\u884c，\u907f\u514d\u7834\u574f\u54cd\u5e94\u7ed3\u6784\u3002<\/p>\n

HEAD \u53ef\u4ee5\u6cbf\u7528\u5bf9\u5e94 GET \u7684\u8d44\u6e90\u4fe1\u606f\u548c\u957f\u5ea6，\u4f46\u4e0d\u8ffd\u52a0\u6b63\u6587；204\u3001304 \u7b49\u65e0\u6b63\u6587\u72b6\u6001\u8981\u4f7f\u7528\u7b26\u5408\u5404\u81ea\u89c4\u5219\u7684\u5206\u652f，\u4e0d\u80fd\u4e0d\u52a0\u533a\u5206\u5730\u8c03\u7528\u8fd9\u4e2a\u5e26\u6b63\u6587\u5e8f\u5217\u5316\u51fd\u6570\u3002<\/p>\n

\u9759\u6001\u6587\u4ef6\u7684 Content-Type \u53ef\u6309\u540e\u7f00\u6620\u5c04，\u4f8b\u5982 HTML \u4f7f\u7528 text\/html，JPEG \u4f7f\u7528 image\/jpeg\u3002\u672a\u77e5\u7c7b\u578b\u53ef\u91c7\u7528 application\/octet-stream\u3002\u957f\u5ea6\u59cb\u7ec8\u6309\u6700\u7ec8\u53d1\u9001\u7684\u5b57\u8282\u5185\u5bb9\u8ba1\u7b97，\u4e0d\u80fd\u62ff\u5b57\u7b26\u6570\u6216\u6587\u4ef6\u8bfb\u53d6\u524d\u7684\u731c\u6d4b\u503c\u4ee3\u66ff\u3002<\/p>\n

\u4e5d\u3001\u5faa\u73af\u53d1\u9001\u5b8c\u6574\u54cd\u5e94<\/h3>\n

\u4e00\u6b21 send \u4e0d\u4fdd\u8bc1\u53d1\u9001\u5b8c\u5168\u90e8\u5b57\u8282\u3002\u9700\u8981\u6839\u636e\u8fd4\u56de\u503c\u63a8\u8fdb\u504f\u79fb：<\/p>\n

bool<\/span> SendAll<\/span>(<\/span>int<\/span> fd,<\/span> const<\/span> std::<\/span>string&<\/span> data)<\/span> {<\/span>
\n std::<\/span>size_t offset =<\/span> 0<\/span>;<\/span>
\n while<\/span> (<\/span>offset <<\/span> data.<\/span>size<\/span>(<\/span>)<\/span>)<\/span> {<\/span>
\n ssize_t n =<\/span> send<\/span>(<\/span>fd,<\/span> data.<\/span>data<\/span>(<\/span>)<\/span> +<\/span> offset,<\/span>
\n data.<\/span>size<\/span>(<\/span>)<\/span> –<\/span> offset,<\/span> MSG_NOSIGNAL)<\/span>;<\/span>
\n if<\/span> (<\/span>n <<\/span> 0<\/span> &&<\/span> errno ==<\/span> EINTR)<\/span> continue<\/span>;<\/span>
\n if<\/span> (<\/span>n <=<\/span> 0<\/span>)<\/span> return<\/span> false<\/span>;<\/span>
\n offset +=<\/span> static_cast<\/span><<\/span>std::<\/span>size_t><\/span><\/span><\/span>(<\/span>n)<\/span>;<\/span>
\n }<\/span>
\n return<\/span> true<\/span>;<\/span>
\n}<\/span><\/p>\n

MSG_NOSIGNAL \u907f\u514d\u5bf9\u5df2\u5173\u95ed\u8fde\u63a5\u5199\u5165\u65f6\u4ea7\u751f SIGPIPE，\u5931\u8d25\u4ecd\u901a\u8fc7\u8fd4\u56de\u503c\u62a5\u544a\u3002\u8fd9\u4e2a\u7248\u672c\u9002\u7528\u4e8e\u963b\u585e\u5957\u63a5\u5b57；\u82e5\u6539\u4e3a\u975e\u963b\u585e\u6a21\u5f0f，\u8fd8\u9700\u4fdd\u5b58\u672a\u53d1\u9001\u6570\u636e\u5e76\u7b49\u5f85\u53ef\u5199\u4e8b\u4ef6\u3002send \u624b\u518c\u7ed9\u51fa\u4e86\u76f8\u5173\u8bed\u4e49\u3002<\/p>\n

\u53d1\u9001\u5b8c\u6210\u540e，\u6309\u672c\u4f8b\u77ed\u8fde\u63a5\u7ea6\u5b9a\u5173\u95ed\u670d\u52a1\u5957\u63a5\u5b57\u3002\u5982\u679c\u5b9e\u9645\u53ea\u53d1\u51fa\u4e00\u90e8\u5206\u5c31\u5931\u8d25，\u5e94\u7ed3\u675f\u8fde\u63a5，\u4e0d\u80fd\u7ee7\u7eed\u5411\u6b8b\u7f3a\u54cd\u5e94\u540e\u9762\u62fc\u63a5\u53e6\u4e00\u4efd\u201c\u9519\u8bef\u54cd\u5e94\u201d\u3002<\/p>\n

\u5341\u3001fork \u4e0e\u63cf\u8ff0\u7b26\u751f\u547d\u5468\u671f<\/h3>\n

\u591a\u8fdb\u7a0b\u6a21\u578b\u53ef\u4ee5\u8ba9\u7236\u8fdb\u7a0b\u63a5\u5165\u8fde\u63a5，\u5b50\u8fdb\u7a0b\u5904\u7406\u8bf7\u6c42\u3002\u63a5\u5165\u4e4b\u540e\u7684\u6838\u5fc3\u63a7\u5236\u6d41\u7a0b\u5982\u4e0b，HandleConnection \u4ee3\u8868\u524d\u9762\u7684\u5b8c\u6574\u6536\u53d1\u4e0e\u5904\u7406\u8fc7\u7a0b：<\/p>\n

pid_t pid =<\/span> fork<\/span>(<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>pid ==<\/span> 0<\/span>)<\/span> {<\/span>
\n close<\/span>(<\/span>listenfd)<\/span>;<\/span>
\n HandleConnection<\/span>(<\/span>clientfd)<\/span>;<\/span>
\n close<\/span>(<\/span>clientfd)<\/span>;<\/span>
\n _exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
\n}<\/span>
\nif<\/span> (<\/span>pid <<\/span> 0<\/span>)<\/span> {<\/span>
\n \/\/ \u8bb0\u5f55 fork \u5931\u8d25，\u5f53\u524d\u8fde\u63a5\u65e0\u6cd5\u4ea4\u7ed9\u5b50\u8fdb\u7a0b\u3002<\/span>
\n}<\/span>
\nclose<\/span>(<\/span>clientfd)<\/span>;<\/span> \/\/ \u7236\u8fdb\u7a0b\u4e0d\u518d\u4fdd\u7559\u8fd9\u4e2a\u8fde\u63a5\u3002<\/span><\/p>\n

fork \u540e\u7236\u5b50\u8fdb\u7a0b\u90fd\u62e5\u6709\u5df2\u6253\u5f00\u63cf\u8ff0\u7b26\u7684\u526f\u672c\u3002\u53ea\u6709\u5b50\u8fdb\u7a0b\u5173\u95ed\u8fde\u63a5\u3001\u7236\u8fdb\u7a0b\u5374\u4e00\u76f4\u4fdd\u7559，\u4f1a\u9020\u6210\u63cf\u8ff0\u7b26\u6cc4\u6f0f，\u8fd8\u53ef\u80fd\u8ba9\u5ba2\u6237\u7aef\u8fdf\u8fdf\u7b49\u4e0d\u5230\u8fde\u63a5\u7ed3\u675f\u3002\u7236\u8fdb\u7a0b\u4e5f\u4f1a\u628a\u8fd9\u4e9b\u65e7\u63cf\u8ff0\u7b26\u7ee7\u7eed\u4f20\u7ed9\u540e\u6765\u7684\u5b50\u8fdb\u7a0b\u3002fork \u624b\u518c\u8bf4\u660e\u4e86\u8fd9\u79cd\u7ee7\u627f\u5173\u7cfb\u3002<\/p>\n

\u7236\u8fdb\u7a0b\u8fd8\u9700\u8981\u56de\u6536\u9000\u51fa\u7684\u5b50\u8fdb\u7a0b，\u4f8b\u5982\u5728\u9002\u5f53\u4f4d\u7f6e\u5faa\u73af\u8c03\u7528 waitpid(-1, &status, WNOHANG)，\u6216\u6309 Linux \u7684\u884c\u4e3a\u663e\u5f0f\u8bbe\u7f6e\u76f8\u5e94\u7684 SIGCHLD \u5904\u7406\u7b56\u7565\u3002\u4e0d\u8981\u5728\u63a5\u5165\u5faa\u73af\u91cc\u65e0\u6761\u4ef6\u963b\u585e\u7b49\u5f85\u67d0\u4e2a\u5b50\u8fdb\u7a0b\u3002\u5b50\u8fdb\u7a0b\u8fd4\u56de\u4e1a\u52a1\u5904\u7406\u540e\u5fc5\u987b\u9000\u51fa，\u4e0d\u80fd\u56de\u5230\u7236\u8fdb\u7a0b\u7684 accept \u5faa\u73af\u3002<\/p>\n

\u667a\u80fd\u6307\u9488\u91ca\u653e\u7684\u662f C++ \u5bf9\u8c61，\u5bf9\u8c61\u53ea\u6709\u5728\u6790\u6784\u65f6\u6267\u884c close，\u624d\u4f1a\u91ca\u653e\u5bf9\u5e94\u63cf\u8ff0\u7b26\u3002Socket \u57fa\u7c7b\u82e5\u901a\u8fc7\u57fa\u7c7b\u6307\u9488\u7ba1\u7406\u6d3e\u751f\u5bf9\u8c61，\u6790\u6784\u51fd\u6570\u5e94\u4e3a virtual；\u6301\u6709\u63cf\u8ff0\u7b26\u7684\u5bf9\u8c61\u8fd8\u5e94\u7981\u6b62\u968f\u610f\u590d\u5236，\u907f\u514d\u91cd\u590d\u5173\u95ed\u3002\u521d\u59cb\u65e0\u6548\u63cf\u8ff0\u7b26\u4f7f\u7528 -1，\u66f4\u5bb9\u6613\u660e\u786e\u6240\u6709\u6743\u3002<\/p>\n

\u5341\u4e00\u3001\u9a8c\u8bc1\u4e0e\u540e\u7eed\u6269\u5c55<\/h3>\n

\u4ee3\u7801\u7247\u6bb5\u5206\u522b\u63a5\u5165\u7f51\u7edc\u5c42\u548c\u534f\u8bae\u5c42\u65f6，\u8981\u7edf\u4e00\u63a5\u53e3\u3001\u9519\u8bef\u8fd4\u56de\u4e0e\u5173\u95ed\u8d23\u4efb\u3002\u5e38\u7528\u5934\u6587\u4ef6\u5305\u62ec string\u3001vector\u3001utility\u3001optional\u3001cerrno，\u4ee5\u53ca Linux \u7684 sys\/socket.h\u3001sys\/stat.h\u3001unistd.h\u3001sys\/wait.h \u7b49\u3002<\/p>\n

\u5728 Linux \u9879\u76ee\u76ee\u5f55\u7f16\u8bd1\u540e，\u670d\u52a1\u53ef\u6309\u65e2\u6709\u5165\u53e3\u542f\u52a8：<\/p>\n

make<\/span>
\n.\/httpserver 8080<\/span><\/p>\n

\u57fa\u672c\u68c0\u67e5\u4e0d\u80fd\u53ea\u770b\u9996\u9875\u662f\u5426\u51fa\u73b0，\u8fd8\u5e94\u5305\u62ec：<\/p>\n\n\u573a\u666f\u91cd\u70b9\u89c2\u5bdf<\/tr>\n\n\n\n\n\n\n\n\n
\u8bf7\u6c42\u9996\u9875\u4e0e\u56fe\u7247<\/td>\n\u6b63\u6587\u5185\u5bb9\u3001\u5a92\u4f53\u7c7b\u578b\u3001\u957f\u5ea6\u662f\u5426\u4e00\u81f4<\/td>\n<\/tr>\n
\u8bf7\u6c42\u4e0d\u5b58\u5728\u7684\u8d44\u6e90<\/td>\n\u76f4\u63a5\u8fd4\u56de 404，\u800c\u975e\u65e0\u4f11\u6b62\u91cd\u5b9a\u5411<\/td>\n<\/tr>\n
\u8bf7\u6c42\u5408\u6cd5\u7a7a\u6587\u4ef6<\/td>\n\u8fd4\u56de\u6210\u529f\u548c\u96f6\u957f\u5ea6\u6b63\u6587<\/td>\n<\/tr>\n
\u5206\u6b21\u53d1\u9001\u62a5\u5934\u4e0e\u6b63\u6587<\/td>\n\u6536\u9f50\u524d\u4e0d\u8fdb\u5165\u4e1a\u52a1\u5904\u7406<\/td>\n<\/tr>\n
\u4f7f\u7528 HEAD<\/td>\n\u8fd4\u56de\u8d44\u6e90\u4fe1\u606f\u4f46\u6ca1\u6709\u6b63\u6587<\/td>\n<\/tr>\n
\u9519\u8bef\u957f\u5ea6\u6216\u8d8a\u754c\u8def\u5f84<\/td>\n\u62d2\u7edd\u8bf7\u6c42，\u6b63\u5e38\u7ed3\u675f\u8fde\u63a5<\/td>\n<\/tr>\n
\u5ba2\u6237\u7aef\u63d0\u524d\u65ad\u5f00<\/td>\n\u4e0d\u8ba9 SIGPIPE \u7ec8\u6b62\u6574\u4e2a\u670d\u52a1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5faa\u73af\u63a5\u6536\u8fd8\u8981\u914d\u5408\u62a5\u5934\u3001\u6b63\u6587\u548c\u8fde\u63a5\u7b49\u5f85\u671f\u9650\u3002\u5355\u6b21\u8bfb\u53d6\u8d85\u65f6\u4e0d\u80fd\u5b8c\u5168\u4ee3\u66ff\u6574\u4efd\u8bf7\u6c42\u7684\u603b\u65f6\u9650，\u5426\u5219\u5ba2\u6237\u7aef\u6301\u7eed\u7f13\u6162\u53d1\u9001\u5b57\u8282，\u4ecd\u53ef\u80fd\u957f\u65f6\u95f4\u5360\u7528\u5904\u7406\u8d44\u6e90\u3002<\/p>\n

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\u7ed3\u8bed<\/h3>\n

HTTP \u670d\u52a1\u5668\u628a\u524d\u9762\u7684\u77e5\u8bc6\u8fde\u63a5\u4e86\u8d77\u6765：TCP \u63d0\u4f9b\u5b57\u8282\u6d41，\u89e3\u6790\u5668\u5212\u5206\u5e76\u7406\u89e3\u8bf7\u6c42，\u8def\u7531\u4e0e\u6587\u4ef6\u6a21\u5757\u4ea7\u751f\u7ed3\u679c，\u54cd\u5e94\u5bf9\u8c61\u518d\u628a\u7ed3\u679c\u7f16\u7801\u4e3a\u5ba2\u6237\u7aef\u80fd\u591f\u7406\u89e3\u7684\u62a5\u6587\u3002<\/p>\n

\u4e09\u7bc7\u5b66\u4e60\u5230\u8fd9\u91cc，\u91cd\u70b9\u5df2\u7ecf\u4ece\u201c\u62fc\u51fa\u4e00\u4e2a\u80fd\u663e\u793a\u7f51\u9875\u7684\u5b57\u7b26\u4e32\u201d，\u63a8\u8fdb\u5230\u201c\u6bcf\u4e2a\u5b57\u8282\u600e\u6837\u88ab\u63a5\u6536\u3001\u89e3\u91ca\u3001\u5904\u7406\u548c\u53d1\u9001\u201d\u3002\u628a\u5b8c\u6574\u6027\u3001\u9519\u8bef\u8def\u5f84\u548c\u8d44\u6e90\u91ca\u653e\u4e00\u8d77\u8003\u8651，\u7a0b\u5e8f\u7684\u884c\u4e3a\u624d\u4f1a\u5728\u4e0d\u540c\u8bf7\u6c42\u6761\u4ef6\u4e0b\u4fdd\u6301\u6e05\u695a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Linux \u7f51\u7edc：HTTP（\u4e09）Linux \u670d\u52a1\u5668\u5b9e\u73b0
\n\u5f15\u8a00
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